Computer Science - Operating Systems Concepts - Discussion

The part of a machine-level instruction that tells the central processor what has to be done is called the operation code (opcode). The opcode specifies the particular operation or action that the processor needs to perform, such as addition, subtraction, loading data from memory, or storing data to memory.

The opcode is a binary code that represents the specific operation to be executed by the processor. It is usually located in the instruction's binary representation at a specific position, allowing the processor to easily identify and interpret the desired operation.

In summary, the operation code (opcode) is the part of a machine-level instruction that informs the central processor about the specific action or operation it needs to perform.

Detailed explanation:.

CPU has ALU (arithmatic and logic unit) for performing many arithmatic and logical operations and CU (control unit) for sending control signal to tell ALU about which operation to be performed.

As we have many operation to be performed by the same hardware unit of ALU, so we should have different binary equivalent code to identify each operation and that binary code is called opcode.

Control unit decode the opcode and issue corresponding control signal to perform appropriate operation between operands.

Operational code is right beacause muchine instruction has two part a) operational code b) operands i.e. address in that address tell about location of operands and operational code tells about what to perform on operands.

I hope you got it.

Answer to the question of @Lucky.

Flip flops are small storage cells which can store one bit of information at a time. They are further used in " registers" too.

There are too many types like SR flip flop. D flip flop, T flip flop etc.

An instruction includes an opcode specifying the operation to be performed, such as "add contents of memory to register", and zero or more operand specifiers, such as registers, memory address or physical data.

The processors job is to process the information right. So the address it cannot process so it has to process only the data. So the data is residing in opcode. As you all are familiar with 8051 instructions.

The machine can understand only the OP-CODES like ADD, MUL, SUB, DIV, SUM etc. So the OP-CODE (operation code) tells the CPU to perform the kind of operations like ADD, MUL, DIV, SUB, .

Whenever a process executed by ALU now it check the process id provided by operating system which helps to identify the required process by processor, the operation is to be performed.

You can see that in the given options only operation code is capable of conducting some operation that too at machine level.

I hope you are satisfied with my answer.

The answer is the operation code. Because it is a machine level code that is controlled by a control unit which controls the operations of the central processor.